S. M. Stieger-Vanegas, Wenker, C., Ziegler-Gohm, D., and Flückiger, M.,
“Ureterolithiasis and papilloma formation in the ureter of a guinea pig.”,
Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association, vol. 44, no. 3, pp. 326-9, 2003.